Home / 129,474.74-178,672.38-72,113.88

Finding the Fourth Proportional to 129,474.74, 178,672.38 and 72,113.88

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Solution

The fourth proportional to 129,474.74, 178,672.38 and 72,113.88 is: 99,515.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,474.74 : 178,672.38 = 72,113.88 : x
  2. Step 2: Convert to fraction form
    129,474.74/178,672.38 = 72,113.88/x
  3. Step 3: Cross multiply
    129,474.74x = 178,672.38 × 72,113.88
  4. Step 4: Simplify right side
    129,474.74x = 12,884,758,815.34
  5. Step 5: Solve for x
    x = 12,884,758,815.34/129,474.74
  6. Step 6: Final answer
    x = 99,515.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.